Valve mechanism



June 8 1926.

o. H. LUDEMAN VALVE MECHANI SM Filed Sept. 25, 1925 Patented June 8, 1926f UNITED STATES PATENT OFFICE,

OSCAR H. LUDEMAN, OFGLEN RIDGE,NEW JERSEY, ASSIGNOR TOLDEMAN BROTIL ERS INCORPORATED, OF NEW YORK, Y., A CORPORATION OF" YORK.

VALVE MECHANISM.

Appneatien ineav september valve. lith such valves when the -emergency valve has been operated andv this succeeded by the closing of the norinally'actuated valve it has been necessary to reset the emergency 'valve for a continued operation. With the present invention the construction isl suoli that a means is provided whereby the emergency valve upon the closing of the throttle valve automatically resets itself Yso that up on the opening ot the throttle valve in the usual manner the parts are in position for continued use. vFeatures and detailsV of the invention will appear from thespecilication and claims.

The invention is illustrated in the accompanying drawing which shows a central section through a valve. l l

l marks theA body of the valve having 'the inlet 1a and discharge 1h separated by the usual diaphragm 2 having` a valve opening 3 therethrough. A seat 4 is arranged 'on the diaphragm for .the normally operated, or throttle valve 5. This valveis provided with a stem 6 extending through a stui'ing box'7 in the cap 8. The stenihas screw'threads 9 operating in screw threads 10 of a yoke 11 carried by the cap. The stern is provided with the usual operating handle 12.

A seat 13 is arranged directly'opposite and concentric with the seat 4 and the emergency or auxiliary valve 14 operates on the seat 13, these two valves closing the space formed by the opening or passage 3. A stem 15 is secured to the valve head 14 and extends through a stuffing box 16 in the cap 17 ofv the valve body. The stem terminates in a piston 18. The piston operates in a cylinder 19 carried by a yolre 20 mounted on the cap 17. A supply passage 21 is arranged in a head 22 and leads to the cylinder. `A supply pipe' 23 leads to the passage 21 and is supplied with a controlling valve 24.

When it is desired to close the Iemergency valve, the valve 24 is opened admitting iuid under pressure to the cylinder and forcing the valve to closed position. The valve 14 is provided with a small Opening 14.a so that immediately the valve head 5 is closed the space between the valve heads is lled with fluid through the passage 1451 so that the .cylinder 19 is cut ori' 25, 1925.. Serial N0. 58,547.

lfluid pressure at the opposite sides of the valve head 14 is balanced. 1 When this happens there is a preponderance of eitective pressure on the inner' side of the valve head due to the area occupiedby the stem 15 on ythe outside of the valve andthe valve is forced outwardly `throu'g'ghfthe pressure in the body by reason ofv the unbalanced -condition incident to the presence of stem.y The emergency valve, therefore, automatically resets itself'uponftheclosing of the throttle valve so that no Jfurther attention is required in the operation ofthe valve, it being, of`

course, yunderstood that the supply tothe the throttle valve; y

Wlhile I have] shown'inerely a manually actuated. valve for controlling thesupply, it will be understood that this may be and usually is `zuitomat-ically controlled' through some emergency controlling mechanism.

A secondpassage 25V leads from 'the cylin- 'der 19. This operates as the exhaust for the `an intervening 'space between them; a iirstl valve rhead lclosing on l'one seat; `a second valve head closing on the other of said seats; means permitting a balancing of pressure in said space upon the closing of both of said valves with the pressure at the opposite'side of the second ,valve head; and means as sociated with the second head to cause automatic opening of the second head upon the balancing of pressure in said space.

2. In a valvegnechanism,the combination of a fluid conduit having two opposing con- -*centric seats having an intervening space between them; a iirst valve head closing on one seat; a second valve head closing on the yother of said seats; means permitting afhalancing of pressure in vsaid space upon the closing of both of said valves with the pressure at the opposite side of the second valve head; and means associated with the sec# piiorrto the closing ofsow;

Iof the ond valve heed Y; -eiusei eliminatie opening of the seeondhead' upon' the balancing of pi'essure in said space.

3.' In ai vz'iive'mechanism:the,combination of Huid `conduit having two' 'seetshaving en intervening sence between them ;l e iist valve head closing; on one seat-y e# ee'eo'ndy valve head Closing on the other ot'saidieeate; l

we' y. Seats having bef-i ,211' .-hfens 2i. .first ngen,- oney seht; e.. Second Y Y d nrthe.othei"offseidseetsg ineens: .perinitting e hlzineiiigipliessluie in Seid epee'y ip'on the closing'v of both` of Saidfvalveg .lth't-he presente et' the opposite Side' oiy the eecondvalv'e' head; e `stein extending from' the Second valvey heed;I and means opeiating through the Stein tot close the vwl-ive;4 said stein' providing an unbelan'eed areay upfoujthe Second valve head.l I

' 5. In in valve lneehzinisni, the Combination of zi fluidV eondit having' two Vopposing ooncentlio 'seats having an' intervening space he"- tweenthein g;- a first Valve head closing on one seat; a. rsecond y 'valve head keloeingl Qin .the otheivof S21-id Seats; ineans'peiilinitting afhalaiming"y of piessure inl vSeid speeezlipon the eiosingof both ,of sztidvalves with the pres'- su're at `the "opposite kside of the nsecond yvalve head; .a lStein extending''viro'ni-v lthe second valve` heed;- and ineens opeifating through thefsfteiiifto eloee thef Valve; Seid ,prolviding` 'an unblfii/eed ee; upon the 4second Valve head.

6. In: a, valve. inechenieinz. the vce'1`noi'-net'ion of a fli'vdf,Conduit4 having. tivo seats'-lav`ing .anfint'eivening,Spglceg between gthein; ai iijst valvehed closirig'pn one seetf; Seeond v 011' plos'it'e side of the second valve heed;v ka stein valve heedy closing' on the othei of Said seats;

lselidwvalvesfwith-the' pieesuie Vat the-op- .posi-te Sldeo'ftheseeondvaiveheadg e stein yezivtendiifig 'from the Second valve head; and

inezinei'o'perating through the stein to close th veive oom iisingvla iiuideetuated preseiiie"'d`evi e, sind stein providingal un unheianeed lwea upon the second vveluwe head,l l

of: el y.fidd-e'i'nduit hevingtvo seete hevig glnwintei ing epeee hetvvveeA them; a.

valve-hedchy closing on.A one' seat; a second valve 'heed eiosing onI the ether of said eeets; ineens peiinitLing'a` 'loeianeing oi' pree- VYsu inSidSp-aee vupon theelesingvof both aid valve?, with the presei'ie at the' op extending fijoin' the second velfveA head;` end nieiinsv opei'ating. thioog'h the stem to @ieee the Vive' Conijiising .211 Huid-actuated preesiiie device and ainenueily eet-mated device, Seid Afsteni povidingdn iinhifiieneed eiea up- Yon thefseeond Valve-h ezidn4 1 8. na vaiveineehainisin, the Combination of a iuidveonduit having tivo sente having an intervening space between theni; a" iiist valve heed closing on one sentie second valve head closing onV theother Y@It Seid sete; means permitting a balancing of pre-Seme in said space upon the Closing of both of said elves with the presente at the opposite side Cif-the' second valve head; a VStem extending frein the vsecond valvehead; and ineens oper'- ,ziting .thin-ugh they steni'to close the valve Comprising a cylinder, a, ypieton in the eyiindei', ineens' fer supplying Huid to the` eyiindeiytoeetimte ythe valve, and a( iestiieted opening leading ioni the cylindery etthe eihanst side ofthe cylinder to retard the closing-,action of the: piston.

In teetiinony:whereof I have her'eiinto eet `my hemd;v A

oeeiieii. LUDEMAN.. t

-. i?. 'In'. a valve mechanism, the combination 

